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/******************************************************************************
 * Copyright (c) 2004, 2006 IBM Corporation and others.
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
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 * SPDX-License-Identifier: EPL-2.0

 *
 * Contributors:
 *    IBM Corporation - initial API and implementation 
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<P>
Provides a set of classes for executing, undoing and redoing units of
work, known as
<i>Commands</i>. 
</P>
<P>
Extends the Eclipse undoable operations framework with the following
behaviour:
<UL>
<LI> self-composing operations </LI>
<LI> return results from operations </LI>
<LI> file modification approval for operations </LI>
</P>

<p>Commands should be executed, undone and redone through an instance of
the {@link org.eclipse.core.commands.operations.IOperationHistory}. </p>

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